Control knob for audio apparatus



FIG. 1 is front view of a control knob for audio apparatus showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a bottom plan view; and

FIG. 6 is a top, front and right side perspective view thereof.

FIG. 7 is a front and bottom perspective view; and

FIG. 8 is an enlarged front and partial top perspective view.

The characteristic features of my design are the configuration of the front groove and the texture of the outer-most band. 

The ornamental design for a control knob for audio apparatus, as shown and described. 